import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/login.vue'
import Home from './components/home.vue'
Vue.use(Router)

const router = new Router({
  routes: [
    {
      // 路由重定向到登录页面
      path: '/', redirect: '/login'
    },
    {
      path: '/login', component: Login
    },
    {
      path: '/home', component: Home
    }
  ]
})
// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  if (to.path === '/login') next()
  const sess = window.sessionStorage.getItem('token')
  if (!sess) {
    return next('/login')
  }
  next()
})
// to表示将要访问的路径
// from表示从哪个路径跳转而来的
// next（）表示放行，next（'/login'）表示跳转到login

export default router
